//support.js
class Container {
    static of(value){
      return new Container(value)
    }
    constructor(value){
      this._value = value
    }
    map(fn){
      return Container.of(fn(this._value))
    }
  }
  
  class Maybe {
    static of(x) {
      return new Maybe(x)
    }
    isNothing() {
      return this._value === null || this._value ===undefined
    }
    constructor(x) {
      this._value = x
    }
    map(fn) {
      console.log(this)
      return this.isNothing() ? this :Maybe.of(fn(this._value))
    }
  }
  
  module.exports = { Maybe, Container}